Allright, I am no expert in these matters. I do find it interesting and important though, that the body and racket is more than just a whip. Muscle action influence the movement of all the joints involved in minute and decisive ways. It is like you have the kinetic chain as the basis, and then the muscle control of the final resulting motion on top of that.
If that makes sense. I have been at the computer for too long...
Wilson PS Classic, Gosen OG Micro 16, 26 kg.